From which direction would you approach suspected hot tyres or brakes?? Serious question, as they can even kill you on the ground.
Fire crews here say "DONT", let them do it instead.
However, they will approach it at 45 degrees to the direction of the bogey as if it causes the tyres to explode then most rubber will be flung out at 0, 90 and 180 degrees and hub assemblies normally get thrown out at around 90 degrees